high8.8
CVE-2026-4342
ingress-nginx comment-based nginx configuration injection
Impact
A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | k8s.io/ingress-nginx | < 0.0.0-20260319175635-5183b7d86137 | 0.0.0-20260319175635-5183b7d86137 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Kubernetes | Nginx Ingress Controller | before 1.13.9 from 1.14.0 before 1.14.5 Version 1.15.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/kubernetes/kubernetes/issues/137893
- http://www.openwall.com/lists/oss-security/2026/03/19/9
- https://github.com/advisories/GHSA-f53h-mxv9-cp98
- https://nvd.nist.gov/vuln/detail/CVE-2026-4342
- https://github.com/kubernetes/ingress-nginx/commit/5183b7d861377a9a2f6d2acaf44f8f6abd5cd0aa